Paper-bag machine.



No. 71|,369. Patented oct. 14, |902.

J. WEST. PAPER BAG MACHINE.

fApplication led June 28, 1900.)

3 Sheets-Silent .L

(H0 Model.)

Nn. 711,369. Paented oct. 14, |902.

J. WEST.

PAPER BAGIMACHINE.

(Application fixed Jun@ 2e, 1900.1

' Ie; sheets-snm 2.

UNITED STATESA PATENT' OFFICE.

.Y A-MES WEST, .OFv ST. LOUIS, MISSOURI, ASSIGNOR, Y lMESN E ASSIGNMENTS, I

TO THE UNION PAPER BAG MACHINE COMPANY, 'OF' PHILADELPH PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA. j f

PAPER-BAG MACHINE..

SPECIFICATION forming part of Letters Patent No. 711,369, dated October 14, 1902.

4 Application iiled .Tune 28, ISOQ. Serial No. 21,883. (No model.)

To 2J/Z whom it may concern/f Be it known that I, JAMES WEST, a citizen of the United States of America, residing in the city of St. Louis,in the State of liriissouri,l have invented a certain new and useful Im. provement in PaperlBag Machines, of which the following is a true and exact description, reference .being had' to the accompanying drawings, which form a part thereof.

My invention relates to a machine .for forming folds or tucks in the bottom of an ordinary square paperbag, so as to make the' bag self-open, as it is termed in the trade, -by which 'is meant that as the bag is filled its Y I5 bottom naturally assumes a square or rec' tangular shape, as shown in `.-`igure XIV of the drawing According to my invention' this object is accomplished by means ofa blast of air acting zo against and employed for the purpose of opening up the side folds of the vbag as it is fed into the tucking-machine and mechanical devices working with the blast to perform the work of forming the tucks in the bottom 2 5 of the bag.

My invention consists in features of lno velty hereinafter fully described, andpointed out in the claims. l

Fig. I is a top or plan View of my machine.

3o Fig. II is a side elevation. Fig. III is an enlarged vertical section taken on. line III III, Fig. I, looking in the direction of the arrow that crosses the section-line. Fig. IV is an enlarged vertical section taken on v'line IV IV, Fig. I, looking in the directexof the arrow. Fig. V is an enlarged vertical section taken on line V V, Fig. I, looking'in the direction of the arrow. Fig. VI is an enlarged vertical section taken lon line VI VI, Fig-I. 4o Fig. VII is a view showing a pair of -creasfing-rollers in elevation. Fig. VIII is a traag;

' verse sectiongtaken on line VIII VIII, Fig... VII. Fig. IX is a perspective View of one o; the folders. Fig. X is a perspective View of an ordinary paper bag asit enters my ma chine. Figs. XI to XIV, inclusive, are perspective views; Fig. XI, a view of the bag when the sides are opened by the air-blast;

Y tom corners are turned back of the folders Fig. XIII, a view of the completed' bag with the corners tucked in and the sides turned .down, and Fi'g. XIV a'view of the bag as it opens out when being filled in use.

Referring to the drawings, 1 represents the main frame of the machine, at the end A of which is a pair of delivery-belts 2, thatpass around rollers 2 and conduct the bag through the machine either direct from a bagform .ing machine or otherwise.

3 represents a pair of grooved drums suitably journaled at theend A of the machine, and the upper one of which receivesa pair of narrow .,belts' 4, while the lower one rel ceives a pair of narrow belts 5', these belts 65 passing also around apair of4 'grooved drums 6, journaled instandards 7', mounted on the base'lof the machine. The boxes 8 of the upper drum 6 are'preferably spring-supported, as shown iuFig. II,Land maybe adjusted vertically by set-screws 9.

The belts 4 and 5 receive the bags from the belts 2 and conduct them to a pair of belts 10, between which they enter. The belts 10 t in grooves made in-the central parts of the drums 6, between the grooves that receive the belts 4 and 5. The belts 4 and 5 carry the bags by contacting with their edges, and the Vbelts 10 carry them by contacting r with their middle parts, the bags; being con- 8c ducted through the machine end on end'with their bottoms foremost. -4 As the belts y10 engage only the middle parts of the bags, thesides of the bags are left free to be operated upon in forming the 'folds of the bottoms of the bagst f It is important that the bags shall be delivered accurately'to the belts 10 and in di rect line with the length of the machine. To accomplish this, I provide `cone-shaped guide disks or rollers 11 outside of the belts 4 and 5, as shown in Figs. I and II, these rollers being arranged.' on shafts 12,- journaled' in brackets 13, mounted on the frame 1,01'l they may be otherwise suitably supported. i The belts 4 and 5l lbear but lightly 'against the bags, so that the latter canbe shifted by they Fig. XII, a view of the bag when' the hot'- cone-shaped rollers or disks 11 if they areouti bags.

ofJine with the length of the machine, and thus be delivered accurately to the belts l0.L Abovethe under part'of the upper belt lO 1- 'the k'ornatiings in tlile what larger than the pins, so that the' rollers hold the belt by a yielding force against the Beneath the rollers 14 and beneath the rollers 16, journaled in plates 17, carried by the frame 1, lthe upper part of the underbelt .1 passing over the rollers 16, as shown. `Beyond the series of rollers 15 and .16 is an upperand lower pair ofrollers 18,.. these .Beyond the rollers 18is anupper' and lower pair ofrollers 19,' these rollersy having conesbaped ends, as .shown in Fig. I.- Beyond the rollers 1.9 isan `upper and lowerv ypair of rollers20,- the ends 4of which' are also `made conical, as'shownFig'v I, but having 'more taper thanl 'therollers 19. Beyond the rollers 20 is an upper land lower pair of wide rollers 21 withiilatf end's,"as' shown in Fig. I. The

y 1 upper rollers1v83j19, 20', and 2'1 rest upon and lcured to the frame 1.

arecarri'ed'by thei'i'pper belt 10, th'ese'rollers being held inpojsitio'n by a distance-plate 22, that is notchedto "receive the axispin 23 of This plate The plate is supported/,by end pieces 24, se-

' The lower rollersA 18,

` 19, 20,'and 21 are supported by'a notched distance-plate 25, properly supported from the frame 1 of the machine, this plate also the frame lof the machine. these .folders is illustrated in. Fig. IX, vand extending across the lower rollers 16 and is notched 'to receive the -journals of these rollers. f z

The forward end of the upper belt 10 passes around a grooved drum 26, journaled in standards 27, secured to the frame 1 of the machine, this roller being preferably mounted in spring-supported boxes made adjustable by set-screws 28,-as shown in Fig. II. The forward end of the lower' belt 10 passes around a grooved drum-29, journaled also in the standards2'7.

represents'an airpipe having valved branches 31, the openends of'whichare presented inwardly and toward. the forward end of the machine, as seen in Fig. I, these branches being located opposite the rollers 14.and 16 and preferably opposite the most rearward pair oi these rollers. Opposite the rollers 14 and 16 is also a pair of folding V- shaped blades 32, (see Figs. II and IX,) supported by brackets 33, adj ustably secured to The shape of their position on the machine withrelation to the rollers 14 is illustrated in Figs. I and II. Forward of the lfolders 32 is a pair o f tucking` 1. The forward edges of these blades or plates areoppgsitegtlle rollers 18,1%),20, andljl, and

livered by the belts 2 to the belts 4 and 5 and byzthelatter belts to the belts 10. As the bags' are carried valong by the -belts landethey are straightened to bring them inline with thelength. of 'the ymach-ine by means of .thecone-sh'aped disks or rollers 11, so that when `'delivered to the belts 10 the bags Will beV in perfect alinement with the'maohine. As the bagsare'carried forward by the belts A1() the airlblastwhich .is directed' against the Afolded sides ofthe `bagopens up the.; sides,.as fshownfin Fig. XII; and -as the bag proceeds .the folding-blades'32.'bend back the corners 3 7 of `the bag'to vthe 'positionshown' inv Fig. XII, and as the Vbag is carried still-'farthe'rfor- -ward. theplates 35 `tuck the corners 37 well back against the sides of the bag under the cone-shaped rollers 19 and 20, which causes the sides to be folded against the plates 35,

-and the rollers 21-press the sides'rxnly against By using. a blast of airto open up the sides of lthe bag in order toigive the mechanical appliances above described a chance to fold and 'tuck in the `corners of thefbottm .of the bag a very inexpensive and effectivefmeans is provided for accomplishingthis purpose.

AThe belts2 are driven by asprocket-chain pitibils efgtherollers13.29, .and 21:" Iny operatin-gthe,machine the ebags are de'- blades or plates- 35, 'adjustably secured to A brackets 36, that aresupported by the frame `it is opened, and as. it is'iilled itwil'l open outV `to the position shown in Fig. XIV.

40 from a suitable motive power, and the` belts 4, 5, and 10 are drivenby a sprocket `wheel and chain connection 41 between the shaft. of one of the' belts 2 and the shaft of the upper roller 6,'the shaft of the uppe'rroller (See Fig. I'A

tom of the bag at the place wherethe corners are bent by the folders 32, this may bedone by interposing a pair of rollers 43 (see Figs.

VII and VIII).betweenthel belts 2 and the I rollers 3, oneof theserollers having a pair of recesses 44 and the other a pair of blades 45,

so that as the bags pass between Athe rollers,

properly timed, the blades will actupon them folders 32.

I claim as my invention- `1. In a machine of the class described,means for directing a blast of air against a bag to open up the sides thereof, in combination with folders for bending back the corners of vth bag, substantially'as described to crease them. at .the vpoints Where they will .y

be bent when they cornelin contact with the V2. In a machine of the class described, the

combination of means for directing a blast of air against the bag to open 'up the sides thereof, means for folding back the corners of the bag, and means for pressing the sides of the bag down onto the 3. In a machine of the class described, the

4 combination o'f means for directing a blast of air against aibag foropening up the sides thereof, means for folding back the corners 4 of the bag, means for tncking in the corners of thebag, and means for pressing the sidesof the bag down onto the corners, substantially as described.v

4. In a machine ofthe class'described, the

vcombination of means for directing a blast of air against a bag to open up the sides thereof, and V-shaped blades for folding back the corners of the bag, substantially as set forth.

5. In a machine of the class described, the combination of means for directing a blast of 'lair against a bag to open up the sides thereof, V-shaped bladesfor folding back the lcorners of the bag, and plates for tucking in the corners, substantially as set forth.

6. 'Ina machine of the class described, the

` combination Aof means for directing a blast of airl against a bag to open up the sides thereof', V-shaped blades forfolding back the'c'orners offthe bag, stationary plates for tucking in the corners, and rollers having graduated cone-shaped ends for pressing the sides of the bag down onto the corners, substantially as set forth.

7. In a machine of the class described, the

combination of means for directing a blast of air against a bag to open up the sides thereof, blades for folding back the corners of the labag, stationary'platesfor tucking in the cor.-

ner's, and aser-ies of pairs'of rollers for progressively pressing the sides of the bag down onto the corners, said rollers having conecorners, substantially as l shaped ends of progressively-varying angle, substantially as set forth. l

8. In a machine-of the class-described, the

combination of moans for directing a blast of air against a bag Vto open up-the sides thereof, means beyond the air-blastfor folding back the corners of the bag, and. means for directing the bags accurately to the machine,

consisting of a pair of belts and cone-shaped rollers located in the rear of -the air-blast,l ksub- Y stantially as described.

9. In a machine ofthe classdeseribed, means opening up the sides thereof, belts between which the bags are carried while being operated upon, rollers located over and beneath the belts, and means for foldingback the corners of the bag, .substantially as set forth.

.'55 for diree'tinga blast of air against a bag for 10., In a machine ofthe class described, the

combinationof means for directing a blast of air against a bag to open up the sides thereof, belts between which the bags are carried While being operated upon, loose rollers 10- cated over one of the belts, rollers located beneaththe other belt, and meansfor folding back and in the corners `of the bag andV means 'for pressing the sides of the bag down upon the corners, substantially as described.

l1. In a machine of the classdescribed the combination with feeding mechanism acting on the center of the bellows-folded bags, of

means for distending the bellows-folded sides,

means for tucking in the corners of the bag,

vliat plates, as 35,. arranged to hold in the cor-' ners in tucked-in position and a series of j rollers of progressi vely-increasing cone shape K'I'MLARK, 

